X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=1328c4cfc586869d18b5d9db46bfcd76afbfbdfc;hb=e73ffd4238c6d1be58d3fcdcf7f100200f033856;hp=41932a6cf5497d51031d6709ef1e7bb102928d59;hpb=31ccebc4925d245fed02545415ce3ee14055d897;p=libsigrok.git

diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index 41932a6c..1328c4cf 100644
--- a/hardware/demo/demo.c
+++ b/hardware/demo/demo.c
@@ -1,8 +1,9 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
  *
  * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
  * Copyright (C) 2011 Olivier Fauchon <olivier@aixmarseille.com>
+ * Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,8 +28,17 @@
 #include <fcntl.h>
 #define pipe(fds) _pipe(fds, 4096, _O_BINARY)
 #endif
-#include "sigrok.h"
-#include "sigrok-internal.h"
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+
+/* Message logging helpers with driver-specific prefix string. */
+#define DRIVER_LOG_DOMAIN "demo: "
+#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
+#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
+#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
+#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
+#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
+#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
 
 /* TODO: Number of probes should be configurable. */
 #define NUM_PROBES             8
@@ -39,6 +49,12 @@
 /* TODO: Should be configurable. */
 #define BUFSIZE                4096
 
+#define STR_PATTERN_SIGROK   "sigrok"
+#define STR_PATTERN_RANDOM   "random"
+#define STR_PATTERN_INC      "incremental"
+#define STR_PATTERN_ALL_LOW  "all-low"
+#define STR_PATTERN_ALL_HIGH "all-high"
+
 /* Supported patterns which we can generate */
 enum {
 	/**
@@ -63,34 +79,34 @@ enum {
 	PATTERN_ALL_HIGH,
 };
 
-/* FIXME: Should not be global. */
-SR_PRIV GIOChannel *channels[2];
-
-struct databag {
+/* Private, per-device-instance driver context. */
+struct dev_context {
+	struct sr_dev_inst *sdi;
 	int pipe_fds[2];
+	GIOChannel *channel;
+	uint64_t cur_samplerate;
+	uint64_t limit_samples;
+	uint64_t limit_msec;
 	uint8_t sample_generator;
-	uint8_t thread_running;
 	uint64_t samples_counter;
-	int dev_index;
-	gpointer session_data;
-	GTimer *timer;
+	void *cb_data;
+	int64_t starttime;
 };
 
-static int hwcaps[] = {
-	SR_HWCAP_LOGIC_ANALYZER,
-	SR_HWCAP_DEMO_DEV,
-	SR_HWCAP_SAMPLERATE,
-	SR_HWCAP_PATTERN_MODE,
-	SR_HWCAP_LIMIT_SAMPLES,
-	SR_HWCAP_LIMIT_MSEC,
-	SR_HWCAP_CONTINUOUS,
+static const int hwcaps[] = {
+	SR_CONF_LOGIC_ANALYZER,
+	SR_CONF_DEMO_DEV,
+	SR_CONF_SAMPLERATE,
+	SR_CONF_PATTERN_MODE,
+	SR_CONF_LIMIT_SAMPLES,
+	SR_CONF_LIMIT_MSEC,
+	SR_CONF_CONTINUOUS,
 };
 
-static struct sr_samplerates samplerates = {
+static const uint64_t samplerates[] = {
 	SR_HZ(1),
 	SR_GHZ(1),
 	SR_HZ(1),
-	NULL,
 };
 
 static const char *pattern_strings[] = {
@@ -99,19 +115,11 @@ static const char *pattern_strings[] = {
 	"incremental",
 	"all-low",
 	"all-high",
-	NULL,
 };
 
 /* We name the probes 0-7 on our demo driver. */
 static const char *probe_names[NUM_PROBES + 1] = {
-	"0",
-	"1",
-	"2",
-	"3",
-	"4",
-	"5",
-	"6",
-	"7",
+	"0", "1", "2", "3", "4", "5", "6", "7",
 	NULL,
 };
 
@@ -130,173 +138,255 @@ static uint8_t pattern_sigrok[] = {
 /* TODO: struct context as with the other drivers. */
 
 /* List of struct sr_dev_inst, maintained by dev_open()/dev_close(). */
-static GSList *dev_insts = NULL;
-static uint64_t cur_samplerate = SR_KHZ(200);
-static uint64_t limit_samples = 0;
-static uint64_t limit_msec = 0;
-static int default_pattern = PATTERN_SIGROK;
-static GThread *my_thread;
-static int thread_running;
+SR_PRIV struct sr_dev_driver demo_driver_info;
+static struct sr_dev_driver *di = &demo_driver_info;
 
-static int hw_dev_acquisition_stop(int dev_index, gpointer session_data);
+static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
 
-static int hw_init(const char *devinfo)
+static int clear_instances(void)
+{
+	/* Nothing needed so far. */
+
+	return SR_OK;
+}
+
+static int hw_init(struct sr_context *sr_ctx)
+{
+	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
+}
+
+static GSList *hw_scan(GSList *options)
 {
 	struct sr_dev_inst *sdi;
+	struct sr_probe *probe;
+	struct drv_context *drvc;
+	struct dev_context *devc;
+	GSList *devices;
+	int i;
+
+	(void)options;
 
-	/* Avoid compiler warnings. */
-	(void)devinfo;
+	drvc = di->priv;
+
+	devices = NULL;
 
 	sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, DEMONAME, NULL, NULL);
 	if (!sdi) {
-		sr_err("demo: %s: sr_dev_inst_new failed", __func__);
-		return 0;
+		sr_err("Device instance creation failed.");
+		return NULL;
+	}
+	sdi->driver = di;
+
+	for (i = 0; probe_names[i]; i++) {
+		if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
+				probe_names[i])))
+			return NULL;
+		sdi->probes = g_slist_append(sdi->probes, probe);
+	}
+
+	devices = g_slist_append(devices, sdi);
+	drvc->instances = g_slist_append(drvc->instances, sdi);
+
+	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
+		sr_err("Device context malloc failed.");
+		return NULL;
 	}
 
-	dev_insts = g_slist_append(dev_insts, sdi);
+	devc->sdi = sdi;
+	devc->cur_samplerate = SR_KHZ(200);
+	devc->limit_samples = 0;
+	devc->limit_msec = 0;
+	devc->sample_generator = PATTERN_SIGROK;
+
+	sdi->priv = devc;
 
-	return 1;
+	return devices;
 }
 
-static int hw_dev_open(int dev_index)
+static GSList *hw_dev_list(void)
 {
-	/* Avoid compiler warnings. */
-	(void)dev_index;
+	return ((struct drv_context *)(di->priv))->instances;
+}
 
-	/* Nothing needed so far. */
+static int hw_dev_open(struct sr_dev_inst *sdi)
+{
+	(void)sdi;
+
+	sdi->status = SR_ST_ACTIVE;
 
 	return SR_OK;
 }
 
-static int hw_dev_close(int dev_index)
+static int hw_dev_close(struct sr_dev_inst *sdi)
 {
-	/* Avoid compiler warnings. */
-	(void)dev_index;
+	(void)sdi;
 
-	/* Nothing needed so far. */
+    sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
 
 static int hw_cleanup(void)
 {
-	/* Nothing needed so far. */
-	return SR_OK;
+	GSList *l;
+	struct sr_dev_inst *sdi;
+	struct drv_context *drvc;
+	int ret = SR_OK;
+
+	if (!(drvc = di->priv))
+		return SR_OK;
+
+	/* Properly close and free all devices. */
+	for (l = drvc->instances; l; l = l->next) {
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("%s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
+		sr_dev_inst_free(sdi);
+	}
+	g_slist_free(drvc->instances);
+	drvc->instances = NULL;
+
+	return ret;
 }
 
-static void *hw_dev_info_get(int dev_index, int dev_info_id)
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
 {
-	struct sr_dev_inst *sdi;
-	void *info = NULL;
+	struct dev_context *const devc = sdi->priv;
 
-	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
-		sr_err("demo: %s: sdi was NULL", __func__);
-		return NULL;
-	}
-
-	switch (dev_info_id) {
-	case SR_DI_INST:
-		info = sdi;
+	switch (id) {
+	case SR_CONF_SAMPLERATE:
+		*data = g_variant_new_uint64(devc->cur_samplerate);
 		break;
-	case SR_DI_NUM_PROBES:
-		info = GINT_TO_POINTER(NUM_PROBES);
+	case SR_CONF_LIMIT_SAMPLES:
+		*data = g_variant_new_uint64(devc->limit_samples);
 		break;
-	case SR_DI_PROBE_NAMES:
-		info = probe_names;
+	case SR_CONF_LIMIT_MSEC:
+		*data = g_variant_new_uint64(devc->limit_msec);
 		break;
-	case SR_DI_SAMPLERATES:
-		info = &samplerates;
-		break;
-	case SR_DI_CUR_SAMPLERATE:
-		info = &cur_samplerate;
-		break;
-	case SR_DI_PATTERNMODES:
-		info = &pattern_strings;
+	case SR_CONF_PATTERN_MODE:
+		switch (devc->sample_generator) {
+		case PATTERN_SIGROK:
+			*data = g_variant_new_string(STR_PATTERN_SIGROK);
+			break;
+		case PATTERN_RANDOM:
+			*data = g_variant_new_string(STR_PATTERN_RANDOM);
+			break;
+		case PATTERN_INC:
+			*data = g_variant_new_string(STR_PATTERN_INC);
+			break;
+		case PATTERN_ALL_LOW:
+			*data = g_variant_new_string(STR_PATTERN_ALL_LOW);
+			break;
+		case PATTERN_ALL_HIGH:
+			*data = g_variant_new_string(STR_PATTERN_ALL_HIGH);
+			break;
+		}
 		break;
+	default:
+		return SR_ERR_NA;
 	}
 
-	return info;
-}
-
-static int hw_dev_status_get(int dev_index)
-{
-	/* Avoid compiler warnings. */
-	(void)dev_index;
-
-	return SR_ST_ACTIVE;
-}
-
-static int *hw_hwcap_get_all(void)
-{
-	return hwcaps;
+	return SR_OK;
 }
 
-static int hw_dev_config_set(int dev_index, int hwcap, void *value)
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 {
 	int ret;
-	char *stropt;
+	const char *stropt;
 
-	/* Avoid compiler warnings. */
-	(void)dev_index;
+	struct dev_context *const devc = sdi->priv;
 
-	if (hwcap == SR_HWCAP_PROBECONFIG) {
-		/* Nothing to do, but must be supported */
-		ret = SR_OK;
-	} else if (hwcap == SR_HWCAP_SAMPLERATE) {
-		cur_samplerate = *(uint64_t *)value;
-		sr_dbg("demo: %s: setting samplerate to %" PRIu64, __func__,
-		       cur_samplerate);
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
+
+	if (id == SR_CONF_SAMPLERATE) {
+		devc->cur_samplerate = g_variant_get_uint64(data);
+		sr_dbg("%s: setting samplerate to %" PRIu64, __func__,
+		       devc->cur_samplerate);
 		ret = SR_OK;
-	} else if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
-		limit_samples = *(uint64_t *)value;
-		sr_dbg("demo: %s: setting limit_samples to %" PRIu64, __func__,
-		       limit_samples);
+	} else if (id == SR_CONF_LIMIT_SAMPLES) {
+		devc->limit_msec = 0;
+		devc->limit_samples = g_variant_get_uint64(data);
+		sr_dbg("%s: setting limit_samples to %" PRIu64, __func__,
+		       devc->limit_samples);
 		ret = SR_OK;
-	} else if (hwcap == SR_HWCAP_LIMIT_MSEC) {
-		limit_msec = *(uint64_t *)value;
-		sr_dbg("demo: %s: setting limit_msec to %" PRIu64, __func__,
-		       limit_msec);
+	} else if (id == SR_CONF_LIMIT_MSEC) {
+		devc->limit_msec = g_variant_get_uint64(data);
+		devc->limit_samples = 0;
+		sr_dbg("%s: setting limit_msec to %" PRIu64, __func__,
+		       devc->limit_msec);
 		ret = SR_OK;
-	} else if (hwcap == SR_HWCAP_PATTERN_MODE) {
-		stropt = value;
+	} else if (id == SR_CONF_PATTERN_MODE) {
+		stropt = g_variant_get_string(data, NULL);
 		ret = SR_OK;
-		if (!strcmp(stropt, "sigrok")) {
-			default_pattern = PATTERN_SIGROK;
-		} else if (!strcmp(stropt, "random")) {
-			default_pattern = PATTERN_RANDOM;
-		} else if (!strcmp(stropt, "incremental")) {
-			default_pattern = PATTERN_INC;
-		} else if (!strcmp(stropt, "all-low")) {
-			default_pattern = PATTERN_ALL_LOW;
-		} else if (!strcmp(stropt, "all-high")) {
-			default_pattern = PATTERN_ALL_HIGH;
+		if (!strcmp(stropt, STR_PATTERN_SIGROK)) {
+			devc->sample_generator = PATTERN_SIGROK;
+		} else if (!strcmp(stropt, STR_PATTERN_RANDOM)) {
+			devc->sample_generator = PATTERN_RANDOM;
+		} else if (!strcmp(stropt, STR_PATTERN_INC)) {
+			devc->sample_generator = PATTERN_INC;
+		} else if (!strcmp(stropt, STR_PATTERN_ALL_LOW)) {
+			devc->sample_generator = PATTERN_ALL_LOW;
+		} else if (!strcmp(stropt, STR_PATTERN_ALL_HIGH)) {
+			devc->sample_generator = PATTERN_ALL_HIGH;
 		} else {
 			ret = SR_ERR;
 		}
-		sr_dbg("demo: %s: setting pattern to %d", __func__,
-		       default_pattern);
+		sr_dbg("%s: setting pattern to %d",
+			__func__, devc->sample_generator);
 	} else {
-		ret = SR_ERR;
+		ret = SR_ERR_NA;
 	}
 
 	return ret;
 }
 
-static void samples_generator(uint8_t *buf, uint64_t size, void *data)
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
+{
+	GVariant *gvar;
+	GVariantBuilder gvb;
+
+	(void)sdi;
+
+	switch (key) {
+	case SR_CONF_DEVICE_OPTIONS:
+		*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
+				hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
+		break;
+	case SR_CONF_SAMPLERATE:
+		g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+		gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
+				ARRAY_SIZE(samplerates), sizeof(uint64_t));
+		g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
+		*data = g_variant_builder_end(&gvb);
+		break;
+	case SR_CONF_PATTERN_MODE:
+		*data = g_variant_new_strv(pattern_strings, ARRAY_SIZE(pattern_strings));
+		break;
+	default:
+		return SR_ERR_NA;
+	}
+
+	return SR_OK;
+}
+
+static void samples_generator(uint8_t *buf, uint64_t size,
+			      struct dev_context *devc)
 {
 	static uint64_t p = 0;
-	struct databag *mydata = data;
 	uint64_t i;
 
 	/* TODO: Needed? */
 	memset(buf, 0, size);
 
-	switch (mydata->sample_generator) {
+	switch (devc->sample_generator) {
 	case PATTERN_SIGROK: /* sigrok pattern */
 		for (i = 0; i < size; i++) {
-			*(buf + i) = ~(pattern_sigrok[p] >> 1);
-			if (++p == 64)
-				p = 0;
+			*(buf + i) = ~(pattern_sigrok[
+				p++ % sizeof(pattern_sigrok)] >> 1);
 		}
 		break;
 	case PATTERN_RANDOM: /* Random */
@@ -305,7 +395,7 @@ static void samples_generator(uint8_t *buf, uint64_t size, void *data)
 		break;
 	case PATTERN_INC: /* Simple increment */
 		for (i = 0; i < size; i++)
-			*(buf + i) = i;
+			*(buf + i) = p++;
 		break;
 	case PATTERN_ALL_LOW: /* All probes are low */
 		memset(buf, 0x00, size);
@@ -314,181 +404,123 @@ static void samples_generator(uint8_t *buf, uint64_t size, void *data)
 		memset(buf, 0xff, size);
 		break;
 	default:
-		/* TODO: Error handling. */
+		sr_err("Unknown pattern: %d.", devc->sample_generator);
 		break;
 	}
 }
 
-/* Thread function */
-static void thread_func(void *data)
-{
-	struct databag *mydata = data;
-	uint8_t buf[BUFSIZE];
-	uint64_t nb_to_send = 0;
-	int bytes_written;
-	double time_cur, time_last, time_diff;
-
-	time_last = g_timer_elapsed(mydata->timer, NULL);
-
-	while (thread_running) {
-		/* Rate control */
-		time_cur = g_timer_elapsed(mydata->timer, NULL);
-
-		time_diff = time_cur - time_last;
-		time_last = time_cur;
-
-		nb_to_send = cur_samplerate * time_diff;
-
-		if (limit_samples) {
-			nb_to_send = MIN(nb_to_send,
-				      limit_samples - mydata->samples_counter);
-		}
-
-		/* Make sure we don't overflow. */
-		nb_to_send = MIN(nb_to_send, BUFSIZE);
-
-		if (nb_to_send) {
-			samples_generator(buf, nb_to_send, data);
-			mydata->samples_counter += nb_to_send;
-
-			g_io_channel_write_chars(channels[1], (gchar *)&buf,
-				nb_to_send, (gsize *)&bytes_written, NULL);
-		}
-
-		/* Check if we're done. */
-		if ((limit_msec && time_cur * 1000 > limit_msec) ||
-		    (limit_samples && mydata->samples_counter >= limit_samples))
-		{
-			close(mydata->pipe_fds[1]);
-			thread_running = 0;
-		}
-
-		g_usleep(10);
-	}
-}
-
 /* Callback handling data */
-static int receive_data(int fd, int revents, void *session_data)
+static int receive_data(int fd, int revents, void *cb_data)
 {
+	struct dev_context *devc = cb_data;
 	struct sr_datafeed_packet packet;
 	struct sr_datafeed_logic logic;
-	static uint64_t samples_received = 0;
-	unsigned char c[BUFSIZE];
-	gsize z;
+	uint8_t buf[BUFSIZE];
+	static uint64_t samples_to_send, expected_samplenum, sending_now;
+	int64_t time, elapsed;
 
-	/* Avoid compiler warnings. */
 	(void)fd;
 	(void)revents;
 
-	do {
-		g_io_channel_read_chars(channels[0],
-				        (gchar *)&c, BUFSIZE, &z, NULL);
-
-		if (z > 0) {
-			packet.type = SR_DF_LOGIC;
-			packet.payload = &logic;
-			logic.length = z;
-			logic.unitsize = 1;
-			logic.data = c;
-			sr_session_send(session_data, &packet);
-			samples_received += z;
-		}
-	} while (z > 0);
+	/* How many "virtual" samples should we have collected by now? */
+	time = g_get_monotonic_time();
+	elapsed = time - devc->starttime;
+	expected_samplenum = elapsed * devc->cur_samplerate / 1000000;
+	/* Of those, how many do we still have to send? */
+	samples_to_send = expected_samplenum - devc->samples_counter;
 
-	if (!thread_running && z <= 0) {
-		/* Make sure we don't receive more packets. */
-		g_io_channel_close(channels[0]);
+	if (devc->limit_samples) {
+		samples_to_send = MIN(samples_to_send,
+				 devc->limit_samples - devc->samples_counter);
+	}
 
-		/* Send last packet. */
-		packet.type = SR_DF_END;
-		sr_session_send(session_data, &packet);
+	while (samples_to_send > 0) {
+		sending_now = MIN(samples_to_send, sizeof(buf));
+		samples_to_send -= sending_now;
+		samples_generator(buf, sending_now, devc);
+
+		packet.type = SR_DF_LOGIC;
+		packet.payload = &logic;
+		logic.length = sending_now;
+		logic.unitsize = 1;
+		logic.data = buf;
+		sr_session_send(devc->cb_data, &packet);
+		devc->samples_counter += sending_now;
+	}
 
-		return FALSE;
+	if (devc->limit_samples &&
+		devc->samples_counter >= devc->limit_samples) {
+		sr_info("Requested number of samples reached.");
+		hw_dev_acquisition_stop(devc->sdi, cb_data);
+		return TRUE;
 	}
 
 	return TRUE;
 }
 
-static int hw_dev_acquisition_start(int dev_index, gpointer session_data)
+static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
+		void *cb_data)
 {
-	struct sr_datafeed_packet *packet;
-	struct sr_datafeed_header *header;
-	struct databag *mydata;
-
-	/* TODO: 'mydata' is never g_free()'d? */
-	if (!(mydata = g_try_malloc(sizeof(struct databag)))) {
-		sr_err("demo: %s: mydata malloc failed", __func__);
-		return SR_ERR_MALLOC;
-	}
+	struct dev_context *const devc = sdi->priv;
+
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
 
-	mydata->sample_generator = default_pattern;
-	mydata->session_data = session_data;
-	mydata->dev_index = dev_index;
-	mydata->samples_counter = 0;
+	devc->cb_data = cb_data;
+	devc->samples_counter = 0;
 
-	if (pipe(mydata->pipe_fds)) {
+	/*
+	 * Setting two channels connected by a pipe is a remnant from when the
+	 * demo driver generated data in a thread, and collected and sent the
+	 * data in the main program loop.
+	 * They are kept here because it provides a convenient way of setting
+	 * up a timeout-based polling mechanism.
+	 */
+	if (pipe(devc->pipe_fds)) {
 		/* TODO: Better error message. */
-		sr_err("demo: %s: pipe() failed", __func__);
+		sr_err("%s: pipe() failed", __func__);
 		return SR_ERR;
 	}
 
-	channels[0] = g_io_channel_unix_new(mydata->pipe_fds[0]);
-	channels[1] = g_io_channel_unix_new(mydata->pipe_fds[1]);
+	devc->channel = g_io_channel_unix_new(devc->pipe_fds[0]);
+
+	g_io_channel_set_flags(devc->channel, G_IO_FLAG_NONBLOCK, NULL);
 
 	/* Set channel encoding to binary (default is UTF-8). */
-	g_io_channel_set_encoding(channels[0], NULL, NULL);
-	g_io_channel_set_encoding(channels[1], NULL, NULL);
+	g_io_channel_set_encoding(devc->channel, NULL, NULL);
 
 	/* Make channels to unbuffered. */
-	g_io_channel_set_buffered(channels[0], FALSE);
-	g_io_channel_set_buffered(channels[1], FALSE);
-
-	sr_source_add(mydata->pipe_fds[0], G_IO_IN | G_IO_ERR, 40,
-		      receive_data, session_data);
-
-	/* Run the demo thread. */
-	g_thread_init(NULL);
-	/* This must to be done between g_thread_init() & g_thread_create(). */
-	mydata->timer = g_timer_new();
-	thread_running = 1;
-	my_thread =
-	    g_thread_create((GThreadFunc)thread_func, mydata, TRUE, NULL);
-	if (!my_thread) {
-		sr_err("demo: %s: g_thread_create failed", __func__);
-		return SR_ERR; /* TODO */
-	}
+	g_io_channel_set_buffered(devc->channel, FALSE);
 
-	if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
-		sr_err("demo: %s: packet malloc failed", __func__);
-		return SR_ERR_MALLOC;
-	}
+	sr_session_source_add_channel(devc->channel, G_IO_IN | G_IO_ERR,
+		    40, receive_data, devc);
 
-	if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
-		sr_err("demo: %s: header malloc failed", __func__);
-		return SR_ERR_MALLOC;
-	}
+	/* Send header packet to the session bus. */
+	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
 
-	packet->type = SR_DF_HEADER;
-	packet->payload = header;
-	header->feed_version = 1;
-	gettimeofday(&header->starttime, NULL);
-	header->samplerate = cur_samplerate;
-	header->num_logic_probes = NUM_PROBES;
-	sr_session_send(session_data, packet);
-	g_free(header);
-	g_free(packet);
+	/* We use this timestamp to decide how many more samples to send. */
+	devc->starttime = g_get_monotonic_time();
 
 	return SR_OK;
 }
 
-static int hw_dev_acquisition_stop(int dev_index, gpointer session_data)
+static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 {
-	/* Avoid compiler warnings. */
-	(void)dev_index;
-	(void)session_data;
+	struct dev_context *const devc = sdi->priv;
+	struct sr_datafeed_packet packet;
+
+	(void)cb_data;
+
+	sr_dbg("Stopping aquisition.");
+
+	sr_session_source_remove_channel(devc->channel);
+	g_io_channel_shutdown(devc->channel, FALSE, NULL);
+	g_io_channel_unref(devc->channel);
+	devc->channel = NULL;
 
-	/* Stop generate thread. */
-	thread_running = 0;
+	/* Send last packet. */
+	packet.type = SR_DF_END;
+	sr_session_send(devc->cb_data, &packet);
 
 	return SR_OK;
 }
@@ -499,12 +531,15 @@ SR_PRIV struct sr_dev_driver demo_driver_info = {
 	.api_version = 1,
 	.init = hw_init,
 	.cleanup = hw_cleanup,
+	.scan = hw_scan,
+	.dev_list = hw_dev_list,
+	.dev_clear = clear_instances,
+	.config_get = config_get,
+	.config_set = config_set,
+	.config_list = config_list,
 	.dev_open = hw_dev_open,
 	.dev_close = hw_dev_close,
-	.dev_info_get = hw_dev_info_get,
-	.dev_status_get = hw_dev_status_get,
-	.hwcap_get_all = hw_hwcap_get_all,
-	.dev_config_set = hw_dev_config_set,
 	.dev_acquisition_start = hw_dev_acquisition_start,
 	.dev_acquisition_stop = hw_dev_acquisition_stop,
+	.priv = NULL,
 };